Bug: ion-option-button and item-button-right don't work together

See this codepen which is the List codepen where I only added the class item-button-right to the ionItem and added the code

<button class="button button-clear button-positive">
     <i class="icon ion-ionic"></i>
</button>

into the ionItem tag. As you see they don’t get along with each other.

What to do?